feat(web-console): unify spatial UI and chat reset

apps/web-console/assistant-chat.js

@@ -72,7 +72,14 @@
     trigger.setAttribute("aria-label", "展开AI助手");
     trigger.title = "展开AI助手";
     trigger.innerHTML = '<i data-lucide="bot-message-square"></i><span class="visually-hidden">AI助手</span><b aria-hidden="true"></b>';
-    ($("#v2PanelControlDock") || document.body).append(trigger);
+    const panelDock = $("#v2PanelControlDock");
+    if (panelDock) {
+      const firstRightPanelToggle = $("[data-panel-toggle]", panelDock);
+      if (firstRightPanelToggle) panelDock.insertBefore(trigger, firstRightPanelToggle);
+      else panelDock.append(trigger);
+    } else {
+      document.body.append(trigger);
+    }
 
     trigger.addEventListener("click", () => {
       setDrawerOpen(!document.body.classList.contains("assistant-drawer-open"));
@@ -1405,17 +1412,22 @@
     const assistantMessage = createMessage("assistant", "", { pending: true });
     pendingMessage = assistantMessage;
     latestControlResult = null;
-    pendingController = new AbortController();
+    const requestController = new AbortController();
+    pendingController = requestController;
     setComposerPending(true);
 
     let completedError = null;
+    let resetForNewConversation = false;
     try {
-      await streamAssistant(messageText, assistantMessage, pendingController.signal);
+      await streamAssistant(messageText, assistantMessage, requestController.signal);
       setMessageContent(assistantMessage, assistantMessage.content, { final: true });
       persistMessages();
     } catch (error) {
       completedError = error;
-      if (pendingController.signal.aborted) {
+      resetForNewConversation = requestController.signal.aborted
+        && requestController.signal.reason === "new_conversation";
+      if (resetForNewConversation) return;
+      if (requestController.signal.aborted) {
         const stopped = assistantMessage.content
           ? `${assistantMessage.content}\n\n已停止继续生成。已下发的车辆操作仍会由安全执行链路完成。`
           : "已停止生成。已下发的车辆操作仍会由安全执行链路完成。";
@@ -1429,17 +1441,21 @@
       }
       persistMessages();
     } finally {
-      pendingController = null;
-      pendingMessage = null;
-      setComposerPending(false);
-      input.focus({ preventScroll: true });
-      window.dispatchEvent(new CustomEvent("cognitive-agent:request-complete", {
-        detail: {
-          utterance: messageText,
-          result: latestControlResult,
-          error: completedError,
-        },
-      }));
+      if (pendingController === requestController) {
+        pendingController = null;
+        pendingMessage = null;
+        setComposerPending(false);
+      }
+      if (!resetForNewConversation) {
+        input.focus({ preventScroll: true });
+        window.dispatchEvent(new CustomEvent("cognitive-agent:request-complete", {
+          detail: {
+            utterance: messageText,
+            result: latestControlResult,
+            error: completedError,
+          },
+        }));
+      }
     }
   }
 
@@ -1490,6 +1506,37 @@
     stored.forEach((message) => createMessage(message.role, String(message.content || "")));
   }
 
+  function resetConversation() {
+    const activeController = pendingController;
+    pendingController = null;
+    pendingMessage = null;
+    latestControlResult = null;
+    if (activeController) activeController.abort("new_conversation");
+
+    sessionStorage.removeItem(STORAGE_KEY);
+    clearActiveModeDraftContext();
+    const nextConversationId = createConversationId();
+    sessionStorage.setItem(CONVERSATION_STORAGE_KEY, nextConversationId);
+
+    const input = $("#utterance");
+    if (input) {
+      input.value = "";
+      delete input.dataset.speechStage;
+      delete input.dataset.speechUtteranceId;
+      delete input.dataset.speechValue;
+      input.dispatchEvent(new Event("input", { bubbles: true }));
+      resizeComposerInput(input);
+    }
+    renderInitialMessages();
+    setComposerPending(false);
+    setDrawerOpen(true);
+    requestAnimationFrame(() => input?.focus({ preventScroll: true }));
+    window.dispatchEvent(new CustomEvent("cognitive-agent:new-conversation", {
+      detail: { conversationId: nextConversationId },
+    }));
+    return nextConversationId;
+  }
+
   function initialize() {
     if (initialized || !$("#requestForm") || !$("#assistantMessages")) return;
     initialized = true;
@@ -1526,9 +1573,8 @@
   document.addEventListener("click", (event) => {
     const target = event.target instanceof Element ? event.target : null;
     if (!target?.closest("#newConversation")) return;
-    sessionStorage.removeItem(STORAGE_KEY);
-    clearActiveModeDraftContext();
-    sessionStorage.setItem(CONVERSATION_STORAGE_KEY, createConversationId());
+    event.preventDefault?.();
+    resetConversation();
   }, true);
 
   document.addEventListener("DOMContentLoaded", initialize);
@@ -1536,6 +1582,7 @@
     submit: submitAssistant,
     open: () => setDrawerOpen(true),
     close: () => setDrawerOpen(false),
+    resetConversation,
     startModeCreation,
     announceModeExecution,
     announceModeCreated(profile) {